Calculating percent area of a selected group.

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Calculating percent area of a selected group.

ZEvans12
So I've done some searching around and it seems like there has been a couple people with the same question that I am having, but I haven't found an answer that is working for me.  I have a SEM sample that I am trying to measure dispersion on.  I have made binary and found the area of all the particles and everything looks great on that.  What I am trying to do now is find the percent of the sample that is taken up by these particles.  I have tried thresholding the image and then using area fraction measurement tool, but I get very high percentages that are obviously not correct.  I tried to make binary to make the images more clear than thresholding and still am not being able to get results that I am looking for.

If there are any other techniques that people have found or that may help me out I would greatly appreciate it.

Thanks in advance,
Zach